Nut-lock.



A; NORDLU-ND.

NUT LOCK. APPLICATION FILED JULY 3, 1908.

Patented July 2 wuzutoz ANTON NORDLUND, OF WARROAD, MINNESOTA. I

NUT-LOOK.

Specification of Letters Patent.

Application filed. July 3', 1908. Serial No. 441,804.

To all whom-it may concern:

Be it known that I, ANTON NORDLUND, citizen of the United States,residing at lVarroad, in the county of Roseau andState ofMinnesota, haveinvented certain new and useful Improvements in Nut-Locks, of whichthefollowing is a specification.

The present invention belongs to means for preventing the loosening ofnuts upon bolts and like parts after the same have been tightened.

In the provision of securing means of'the nature aforesaid, it is commonto interpose a lock Washer between the nut and the part secured thereby,said lock washer having a spring tongue to engage with a tooth or likepart of the nut and secured against rotation, thereby preventing theloosening of the fastening, Considerable difliculty has been encounteredto remove the nut when secured by fastening means as generally provided,hence either thenut or the lock devices are either destroyed ormutilated to such an extent'as to preventtheir reuse.

The present invention interposes between the nut and the lock washer arelease washer, the same having an opening for the tongue of the lockwasher to project through, and said release washer being movable todepress the tongue of the lock washer so as to prevent itseng'agen'ie'nt with the tooth or en gaging part of the nut.

For a full understanding of the invention and the merits thereof andalso to acquire a knowledge of the details of construction and the meansfor eifecting the result, reference is to be had to the followingdescription and accompanying drawings.

While the invention may be adapted to different forms and conditions bychanges in the structure and minor details without departing from thespirit or essential features thereof, still the preferred embodiment isshown 'in the accompanying drawings, in which:

Figure 1 is a central longitudinal section of a bolt provided with lockmeans embodying the invention. Fi 2 is a detail View of the lock washer.Fig. 3 is a detail view of the release washer. Fig. dis a side view ofthe nut lock, showingthe spring tongue in engagement with the nut. Fig.5 is a view similar to Fig. 4, showing the ton ue depressed or held outof engagement with the nut.

Corresponding and like parts are referred ratentedja i 2%, 1909.-

to in the following description and indicated in all the views of thedrawings by the same reference characters. 1

The part 1' may be a bolt, rod or like fastening having a. portionthreaded, having a longitudinal groove 2 intersecting the threads. Thenut 3 has'its opening provided with screw threads to match the threadedportion of the bolt or fastening 1 and has a series of teeth 4 uponitsinner face so as to make interlocking engagement with the springtongue of the lock Washer.

The lock washer 5 is adapted to slip upon the bolt or part 1 and is heldagainst rotation thereon. To effect the latter result, a teat 6 extendsinward from the inner edge of the washer and is ada ted to enter the thebolt 1. A

longitudinal groove 2 o v tongue 7 is partly out from the washer 5 andis pressed to one side thereof at its free end so as to engage with theteeth 4 of the nut and prevent backward rotation of the latter. A springtongue 7 is provided at the outer edge of the lock Washer and curves inits length and is sufliciently stout to effect the desired result. Anotch 8 is formed in an edge of the lock washer and is adapted toregister with a corresponding notch 9 in the edge of the release washerto indicate the proper position of the latter. The notches 8 and 9 arealso adapted to receive the edge of a suitable tool to prevent rotationof the release washer when it is required to hold f the same stationary.

The release washer 10 is adapted to slip loosely upon the threadedortion of the bolt or part1 and is-arrange between the lock washer andthe nut. An opening 11 is provided in an edge portion of the releaseWasher toreceive the free end portion of the lock .tongue 7 A portion ofthe release washer at one side of the opening 11 is re-- duced inthickness to provide ample clearance for the spring lock tongue 7, Thereduced. part is indicated at 12 and tapers toward the opening, thetaper vanishing some distance from the opening 11.

[When the parts are assembled, the lock washer 5 is slipped upon thebolt 1 after which the release Washer 10 is placed upon the boltover'the lock washer, and the nut is next placed in position and screwedhome upon the bolt. The release washer is so positioned as to admit ofthe freeend of the spring tongue 7- extending throu h the open-- ing 11therein so as to engage with the teeth 450i the nut-andlock the latteragainst back- 1 tended from said washer for engagement in 20 When it isrequired to remove, the nut, the release washer is turned so as to throwthe openin 11 out of registry with the free end 0 the oc'k tongue andthis may be ac- -complished- -bylturniiig the washer 10 forwardeitherjwith the nut or independently thereof, as may be found mostconvenient. When the release washer is turned forward,

1 the beveled or taperedportion 12-rides upon the free end' of the locktongue 7 and de presses the same or moves rite out of engage- .ment withthe teeth of the'nut, as shown 15 most-clearly in Fig. 5. v

Having thus described the invention, wliat is claimed as new is: 4

As an article of manufacture a nut lock comprising a washer, a luginwardly exward rotation when properly tightened. a groove formedlongitudinally in a bolt,

said washer being cut away at its edge inwardly and circularly to form atongue, said tongue being bent laterally, and a second washer adaptedfor loose'engagement u on the bolt having an opening cut in the e gethereof to admit of the passage of the tongue therethrough at times toengage teeth formed upon the inner face of a nut on the bolt, saidwasher having a beveled edge at one side of the opening formed thereinto efl'ect the gradual withdrawal of the tongue.

,In testimony whereof I afiix my signature in presence of two witnesses.

ANTON NORDLUND. [1 s.] Witnesses: 4

A. SODERSTROM,

E. B. HANSON.

